CN107588764B - Optical fiber gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup - Google Patents
Optical fiber gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup Download PDFInfo
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Abstract
A four-axis redundant configuration power supply and circuit board cold backup optical fiber gyro assembly relates to the technical field of small satellite inertia measurement; the gyroscope comprises a shell, an upper cover, a body, a light source group, a gyroscope group, a Y waveguide, a coupler, a gyroscope three-way digital circuit board, a circuit board bracket, a gyroscope single-way digital circuit board, a gyroscope analog driving circuit board, a signal processing and interface circuit board and a transformer; the upper cover is fixedly arranged on the upper surface of the shell; the body is fixedly arranged at the central position in the shell groove; the gyroscope comprises a body, a light source group, a gyroscope group, a Y waveguide, a coupler, a gyroscope three-way digital circuit board, a circuit board support, a gyroscope single-way digital circuit board, a gyroscope analog driving circuit board, a signal processing and interface circuit board and a transformer which are sequentially arranged in a closed shell consisting of a shell and an upper cover from bottom to top. The invention has good mechanical resistance and reduces the structural weight; the photoelectric integration integrated design reduces the power consumption of the assembly, realizes fault detection and isolation and has high reliability.
Description
Technical Field
The invention relates to the technical field of microsatellite inertia measurement, in particular to a four-axis redundant configuration power supply and circuit board cold backup optical fiber gyroscope assembly.
Background
With the development and transformation of the aerospace field and the whole aerospace ecosystem, the small satellite with the advantages of low investment and operation cost, strong emergency capability and flexibility, short system construction period and the like is widely used for communication, science, technical test, military, education, earth observation and the like, has wide development prospect in the military and civil fields, and has the unblocked potential for the popularization, commercialization and market competition of the small satellite.
As a key device of the attitude control system, the inertial instrument directly influences the precision and the performance of the system. The market demand of the small satellite for the attitude sensor is increased, and the optical fiber gyro component is widely applied by virtue of the advantages of the small satellite in various aspects such as volume, power consumption, precision, space environment adaptability and the like.
The optical fiber gyroscope is a novel all-solid-state sensor for measuring spatial inertial rotation by using an optical fiber sensing technology, light emitted by a laser diode is transmitted along an optical fiber in two directions on the basis of an optical fiber coil, and the angular displacement of a sensitive element is determined by the change of a light transmission path.
The fiber-optic gyroscope is mainly characterized in the following aspects: (1) the instrument is solid, firm and stable, and has strong impact resistance and acceleration resistance; (2) the service life of the optical device is long, no rotating part or friction part exists, and the service life of the optical device is long; (3) the method has the advantages that the method is high in precision, the propagation time of coherent light beams is extremely short, the coherent light beams can be started instantly theoretically, and the dynamic range is wide; (4) the optical fiber ring has high reliability, the optical path is increased, the detection sensitivity and the resolution are improved by multiple orders of magnitude relative to the laser gyro, and the locking problem of the gyro is effectively overcome. And the integrated optical path technology is easy to adopt, the signal is stable and reliable, and the digital output can be used.
The existing fiber optic gyroscope assembly mostly adopts a three-axis design scheme, and has no redundant design of a fiber optic gyroscope, so that the attitude of three axes relative to an inertial space cannot be provided when any one axis fails, and fault detection and isolation cannot be realized. Meanwhile, the photoelectric modules are separated, and the size and the weight of the assembly are relatively large on the premise of meeting the requirements of technical indexes such as precision and the like; the light source, the secondary power supply and the signal processing circuit board have no backup, single-point failure exists, and the reliability is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the optical fiber gyroscope component with the four-axis redundant configuration power supply and the circuit board cold backup, which has good mechanical resistance and reduces the structural weight; the photoelectric integration integrated design reduces the power consumption of the assembly, realizes fault detection and isolation and has high reliability.
The above purpose of the invention is realized by the following technical scheme:
a fiber optic gyroscope assembly with a four-axis redundant configuration power supply and a circuit board cold backup comprises a shell, an upper cover, a body, a light source group, a gyroscope group, a Y waveguide, a coupler, a gyroscope three-way digital circuit board, a circuit board support, a gyroscope single-way digital circuit board, a gyroscope analog driving circuit board, a signal processing and interface circuit board and a transformer; the shell is of a rectangular structure with a groove at the top; the plane size of the upper cover is the same as that of the shell, and the upper cover is fixedly arranged on the upper surface of the shell; the gyroscope comprises a body, a light source group, a gyroscope group, a Y waveguide, a coupler, a gyroscope three-way digital circuit board, a circuit board support, a gyroscope single-way digital circuit board, a gyroscope analog driving circuit board, a signal processing and interface circuit board and a transformer, wherein the body, the light source group, the gyroscope group, the Y waveguide, the coupler, the gyroscope three-way digital circuit board, the circuit board support, the gyroscope single-way digital; the body is fixedly arranged at the central position in the shell groove; the light source group is fixedly arranged at the bottom of the body; the gyroscope group is fixedly arranged on the side wall and the bottom of the body; the Y waveguide is fixedly arranged on the upper surface of the body; the coupler is fixedly arranged on the upper surface of the Y waveguide; the gyroscope three-way digital circuit board is fixedly arranged on the upper surface of the coupler; the circuit board bracket is fixedly arranged on the upper surface of the gyro three-way digital circuit board; the gyro single-channel digital circuit board is fixedly arranged on the upper surface of the circuit board support; the gyro analog driving circuit board is fixedly arranged on the upper surface of the gyro single-path digital circuit board; the signal processing and interface circuit board is fixedly arranged on the upper surface of the gyro analog driving circuit board; the transformer is fixedly arranged on the lower surface of the upper cover.
In the optical fiber gyro assembly for the four-axis redundant configuration power supply and the circuit board cold backup, the optical fiber gyro assembly further comprises a 9-pin connector, a 31-pin connector and a reference mirror grounding pile; wherein, the 9-pin connector and the 31-pin connector are fixedly arranged on the side wall of the upper cover; the reference mirror is fixedly arranged on the side wall of the bottom of the shell; the grounding pile is of a cylindrical structure and is fixedly installed on the side wall of the bottom of the shell in an axially vertical mode.
In the optical fiber gyro assembly for the four-axis redundant configuration power supply and the circuit board cold backup, the light source group comprises two SLD light sources; two SLD light sources are symmetrically and fixedly arranged on the lower surface of the body.
In the optical fiber gyro assembly for the four-axis redundant configuration power supply and the circuit board cold backup, the gyro set comprises 4 gyros; wherein, 1 gyro is horizontally and fixedly arranged on the lower surface of the body; the other 3 gyros are fixedly arranged on the side wall of the body.
In the optical fiber gyro assembly with the four-axis redundant configuration power supply and the circuit board cold backup, the 3 gyros are fixedly arranged on the side wall of the body, two of the gyros are mutually orthogonal to the gyros fixedly arranged on the lower surface of the body, and the other gyro is obliquely and fixedly arranged on the side surface of the body; and the inclined gyroscope has the same included angle with the other three gyroscopes.
In the optical fiber gyro assembly with the four-axis redundant configuration power supply and the circuit board for cold backup, the signal processing and interface circuit board comprises 2 secondary power supplies and 2 signal processing and interface circuits.
In the optical fiber gyro component for the four-axis redundant configuration power supply and the circuit board cold backup, the central wavelengths of the two SLD light sources are 1310 nm; the fiber loop has a length of 520m and a diameter of 42 mm.
In the optical fiber gyro assembly with the four-axis redundant configuration power supply and the circuit board for cold backup, the size of the reference mirror is 15mm multiplied by 15mm, and the precision is 10' grade; the distance between the grounding pile and the bottom surface of the shell is 9-11 mm.
In the optical fiber gyro assembly with the four-axis redundant configuration power supply and the circuit board for cold backup, the shell is made of hard aluminum 2A12 material, and the surface emissivity is epsilon
H0.85 or more.
Compared with the prior art, the invention has the following advantages:
(1) the four-axis integrated fiber optic gyroscope is adopted, the layout is compact, and the structural weight is reduced;
(2) the invention adopts the photoelectric integration design, reduces the volume of the assembly and reduces the power consumption of the assembly;
(3) the invention adopts the configuration of the main backup light source and the backup light source, when one light source fails, the light source can be switched through a switching instruction;
(4) the invention adopts the secondary power supply and the cold backup of the signal processing and interface circuit, and starts the corresponding power supply and the signal processing and interface circuit after switching the light source, thereby improving the reliability;
(5) the invention adopts a four-axis integrated redundancy design scheme, when the device is used on a rail, no more than three axes fail, and the device can still provide three-axis attitude angular velocity, thereby realizing fault detection and isolation.
Drawings
FIG. 1 is a schematic view of the present invention after structural assembly;
fig. 2 is an exploded view of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
as shown in fig. 1, which is a schematic diagram of a combined structure, it can be seen that a four-axis redundant configuration power supply and circuit board cold backup optical fiber gyro assembly includes a housing 1 and an upper cover 2; the shell 1 is of a rectangular structure with a groove at the top; the upper cover 2 has the same plane size as the housing 1, and the upper cover 2 is fixedly mounted on the upper surface of the housing 1.
As shown in fig. 2, which is an exploded view, it can be seen that the fiber optic gyroscope assembly further includes a body 3, a light source group 4, a gyroscope group 5, a Y waveguide 6, a coupler 7, a gyroscope three-way digital circuit board 8, a circuit board support 9, a gyroscope single-way digital circuit board 10, a gyroscope analog driving circuit board 11, a signal processing and interface circuit board 12, and a transformer 13; the gyroscope comprises a body 3, a light source group 4, a gyroscope group 5, a Y waveguide 6, a coupler 7, a gyroscope three-way digital circuit board 8, a circuit board support 9, a gyroscope single-way digital circuit board 10, a gyroscope analog driving circuit board 11, a signal processing and interface circuit board 12 and a transformer 13, wherein the body, the light source group 4, the gyroscope group 5, the Y waveguide 6, the coupler 7, the gyroscope three-way digital circuit board, the circuit board support 9, the gyroscope single; the body 3 is fixedly arranged at the central position in the groove of the shell 1; the light source group 4 is fixedly arranged at the bottom of the body 3; the light source group 4 includes two SLD light sources; two SLD light sources are symmetrically and fixedly arranged on the lower surface of the body 3. The central wavelengths of the two SLD light sources are 1310nm, the coupler 7 is a single-mode fiber coupler, the reliability is high, the polarization-dependent loss is small, and the performance is stable in the full-temperature range; the optical fiber ring adopts a four-stage symmetrical winding method; the gyroscope digital circuit part adopts a differential signal detection mode to realize the detection and filtering of photoelectric signals, outputs pulse signals in direct proportion to angular velocity and simultaneously realizes closed-loop control; the fiber loop has a length of 520m and a diameter of 42 mm. The gyro group 5 is fixedly arranged on the side wall and the bottom of the body 3; the Y waveguide 6 is fixedly arranged on the upper surface of the body 3; the coupler 7 is fixedly installed on the upper surface of the Y waveguide 6; the gyro three-way digital circuit board 8 is fixedly arranged on the upper surface of the coupler 7; the circuit board bracket 9 is fixedly arranged on the upper surface of the gyro three-way digital circuit board 8; a gyro single-channel digital circuit board 10 is fixedly arranged on the upper surface of the circuit board support 9; the gyro analog driving circuit board 11 is fixedly arranged on the upper surface of the gyro single-path digital circuit board 10; the signal processing and interface circuit board 12 is fixedly arranged on the upper surface of the gyro analog driving circuit board 11; the transformer 13 is fixedly mounted on the lower surface of the upper housing 2.
The fiber-optic gyroscope component also comprises a 9-pin connector 14, a 31-pin connector 15, a reference mirror 16 and a grounding pile 17; wherein, the 9-pin connector 14 and the 31-pin connector 15 are fixedly arranged on the side wall of the upper cover 2; the reference mirror 16 is fixedly arranged on the side wall of the bottom of the shell 1, the size is 15mm multiplied by 15mm, the self precision is 10 'grade, and the installation precision of the input shaft of the fiber-optic gyroscope component relative to the normal direction of the reference mirror is better than +/-10'; the ground peg 17 is fixedly mounted on the bottom side wall of the housing 1, 10mm from the mounting bottom, and has a size of M3 × 8, and is equipped with 2M 3 gold plated nuts and two gold plated pads.
Wherein, the gyro group 5 comprises 4 gyros; wherein 1 gyro is horizontally and fixedly arranged on the lower surface of the body 3; the other 3 gyros are fixedly arranged on the side wall of the body 3. 3 gyros fixedly arranged on the side wall of the body 3, wherein two gyros are mutually orthogonal with the gyros fixedly arranged on the lower surface of the body 3, and the other gyro is obliquely and fixedly arranged on the side surface of the body 3; and the inclined gyroscope has the same included angle with the other three gyroscopes.
The signal processing and interface circuit board 12 includes 2 secondary power supply circuits and 2 signal processing and interface circuits.
The outer envelope dimension of the optical fiber gyro component is 117 +/-2 mm multiplied by 108mm +/-2 mm multiplied by 91 +/-2 mm, and the weight is 1 +/-0.1 kg.
The optical fiber gyro assembly casing 1 is made of duralumin 2A12 material and has surface emissivity epsilon
H0.85 or more.
The optical fiber gyro component mounting holes 17 are 4 through holes, and the size is phi 4.5 +/-0.1 mm.
The surface state of the mounting surface of the optical fiber gyro component is natural color oxidation, the thickness of the mounting foot is 6.5mm, the flatness is better than 0.1/100 multiplied by 100mm, and the roughness is better than 3.2 um.
The upper surface of the upper cover 2 of the optical fiber gyro component is imprinted with a coordinate system identifier, the coordinate system comprises X, Y, Z three-axis pointing direction, an X axis vertically points to the installation surface, a Y axis is positioned in a horizontal plane and points to the opposite directions of the connector 14 and the connector 15, and a Z axis is vertically positioned in the Y axis in the horizontal plane and points to accord with right-hand rules.
The optical fiber gyro component comprises two light sources, a gyro set 5, a gyro three-way digital circuit board, a gyro single-way digital circuit board and two gyro analog driving circuit boards. Each single-axis gyroscope is provided with an independent signal processing circuit, and the 4 single-axis fiber-optic gyroscopes are independent to each other and have consistency and interchangeability, so that crosstalk among 4-path gyroscope signal acquisition and modulation-demodulation circuits is avoided, the method is an important measure for reducing electromagnetic crosstalk and ensuring gyroscope precision, the maintainability of a product is enhanced, and the assembly difficulty is reduced; the two gyroscope simulation driving circuit boards correspondingly drive the two light sources to realize the switching of the main and standby light sources;
the two signal processing and interface circuits adopt an ARM board to form a computer unit of the optical fiber gyro component, and are used for receiving angular velocity signals of the four-axis gyro, receiving temperature signals, compensating, completing CAN interface communication with a control system, sending measurement information to the control system according to the requirements of a communication protocol, and receiving corresponding remote control instructions;
the two secondary power supply circuits convert the primary power supply into a secondary power supply required by the optical fiber gyro assembly, supply power for the two signal processing and interface circuit boards, the single-channel gyro digital circuit board, the three-channel gyro digital circuit board and the two gyro analog driving circuit boards, and have the function of inhibiting surge current;
the gyroscope group 5 comprises an orthogonal axis X axis, an orthogonal axis Y axis, an orthogonal axis Z axis and an oblique axis S axis and is used for measuring the three-axis angular velocity information of the carrier;
the main backup secondary power supply circuit has the function of inhibiting surge current, converts a primary power supply into a power supply required by the optical fiber gyro component, and supplies power for the four-axis integrated optical fiber gyro and the main backup signal processing and interface circuit;
the main backup signal processing and interface circuit internally completes the acquisition, reception and processing of the measurement information and the temperature signal of the fiber-optic gyroscope by taking an ARM as a center; and the communication with the control system is finished to the outside, the measurement information is sent to the control system according to the requirement, and a corresponding remote control instruction is received.
The main backup light source driving circuit realizes the driving of the light source.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (7)
1. The utility model provides a four-axis redundant configuration power and circuit board cold backup's optic fibre top subassembly which characterized in that: the gyroscope comprises a shell (1), an upper cover (2), a body (3), a light source group (4), a gyroscope group (5), a Y waveguide (6), a coupler (7), a gyroscope three-way digital circuit board (8), a circuit board support (9), a gyroscope single-way digital circuit board (10), a gyroscope analog driving circuit board (11), a signal processing and interface circuit board (12) and a transformer (13); the shell (1) is of a rectangular structure with a groove at the top; the plane size of the upper cover (2) is the same as that of the shell (1), and the upper cover (2) is fixedly arranged on the upper surface of the shell (1); the gyroscope comprises a body (3), a light source group (4), a gyroscope group (5), a Y waveguide (6), a coupler (7), a gyroscope three-way digital circuit board (8), a circuit board support (9), a gyroscope single-way digital circuit board (10), a gyroscope analog driving circuit board (11), a signal processing and interface circuit board (12) and a transformer (13) which are positioned in a closed shell formed by a shell (1) and an upper cover (2); the body (3) is fixedly arranged at the central position in the groove of the shell (1); the light source group (4) is fixedly arranged at the bottom of the body (3); the gyroscope group (5) is fixedly arranged on the side wall and the bottom of the body (3); the Y waveguide (6) is fixedly arranged on the upper surface of the body (3); the coupler (7) is fixedly arranged on the upper surface of the Y waveguide (6); the gyro three-way digital circuit board (8) is fixedly arranged on the upper surface of the coupler (7); the circuit board bracket (9) is fixedly arranged on the upper surface of the gyro three-way digital circuit board (8); the gyro single-channel digital circuit board (10) is fixedly arranged on the upper surface of the circuit board support (9); the gyro analog driving circuit board (11) is fixedly arranged on the upper surface of the gyro single-channel digital circuit board (10); the signal processing and interface circuit board (12) is fixedly arranged on the upper surface of the gyro analog driving circuit board (11); the transformer (13) is fixedly arranged on the lower surface of the upper cover (2);
the light source group (4) comprises two SLD light sources; the two SLD light sources are symmetrically and fixedly arranged on the lower surface of the body (3); the central wavelengths of the two SLD light sources are 1310 nm; the length of the optical fiber ring is 520m, and the diameter of the optical fiber ring is 42 mm;
the external envelope size of the gyroscope group (5) is 117 plus or minus 2mm multiplied by 108mm plus or minus 2mm multiplied by 91 plus or minus 2mm, and the weight is 1 plus or minus 0.1 kg; the surface state of the mounting surface of the gyroscope group (5) is natural oxidation, the thickness of the mounting pin is 6.5mm, the flatness is better than 0.1/100 multiplied by 100mm, and the roughness is better than 3.2 um.
2. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 1, wherein: the optical fiber gyro assembly further comprises a 9-pin connector (14), a 31-pin connector (15), a reference mirror (16) and a grounding pile (17); wherein, the 9-pin connector (14) and the 31-pin connector (15) are fixedly arranged on the side wall of the upper cover (2); the reference mirror (16) is fixedly arranged on the side wall of the bottom of the shell (1); the grounding pile (17) is of a cylindrical structure and is fixedly arranged on the side wall of the bottom of the shell (1) in an axial and vertical mode.
3. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 2, wherein: the gyro group (5) comprises 4 gyros; wherein 1 gyro is horizontally and fixedly arranged on the lower surface of the body (3); the other 3 gyros are fixedly arranged on the side wall of the body (3).
4. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 3, wherein: the 3 gyros are fixedly arranged on the side wall of the body (3), two of the gyros are mutually orthogonal to the gyros fixedly arranged on the lower surface of the body (3), and the other gyro is obliquely and fixedly arranged on the side wall of the body (3); and the inclined gyroscope has the same included angle with the other three gyroscopes.
5. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 4, wherein: the signal processing and interface circuit board (12) comprises 2 secondary power supplies and 2 signal processing and interface circuits.
6. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 5, wherein: the size of the reference mirror (16) is 15mm multiplied by 15mm, and the precision is 10' grade; the distance between the grounding pile (17) and the bottom surface of the shell (1) is 9-11 mm.
7. The fiber optic gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup of claim 6, wherein: the shell (1) is made of duralumin 2A12 material, and the surface emissivity epsilon H is more than or equal to 0.85.
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| CN201710667507.6A CN107588764B (en) | 2017-08-07 | 2017-08-07 | Optical fiber gyroscope assembly for four-axis redundant configuration power supply and circuit board cold backup |
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| CN115096283B (en) * | 2022-08-25 | 2022-11-04 | 中国船舶重工集团公司第七0七研究所 | Hemispherical resonant gyroscope inertial navigation system and design method thereof |
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